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| Tehran_North |  |
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| 02155401754 | |
| ajaxbolt | |
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The M8X40 flat-head Allen screw, grade 8.8, manufactured according to DIN 7991 standards, has a nominal diameter of 8 millimeters and a length of 40 millimeters. Its unit weight is approximately 0.065 kilograms per 10 centimeters, allowing engineers to accurately calculate total assembly weight and load distribution. The screw is made from high-strength alloy steel with controlled carbon content, providing enhanced tensile strength and wear resistance. The thread pitch is 1.25 millimeters, and the thread depth is around 0.8 millimeters, ensuring uniform engagement in nuts or tapped holes. The hexagonal Allen socket allows secure torque application, providing optimal tightening and preventing slippage during assembly.
The tensile strength of the M8X40 8.8 Allen flat-head screw is approximately 800 MPa, with a yield strength of 640 MPa, making it suitable for high-load industrial applications. Its threads are precision-machined to reduce friction and improve wear resistance during repeated assembly cycles. The alloy steel material also offers high shear resistance, durability under cyclic loads, and stability in various environmental conditions. Surface finishing ensures uniform hardness between 200–220 HV, while compliance with DIN 7991 guarantees dimensional accuracy, reliable mechanical performance, and secure fastening in machinery frames, structural assemblies, and industrial equipment.
WEBSITE: M8X40 allen screw DIN7991 Iran
